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ICD-10-CM 2027 diagnosis code

T43.201Poisoning by unspecified antidepressants, accidental (unintentional)

Not billable — use a more specific codeRequires 7th character

T43.201 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.Short description: Poisoning by unsp antidepressants, accidental

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About T43.201

T43.201 is the ICD-10-CM diagnosis code for poisoning by unspecified antidepressants, accidental (unintentional). It belongs to category T43 (poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified), block T36-T50 (poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within T43.20, choose T43.201 (Poisoning by unspecified antidepressants, accidental (unintentional)) only when documentation doesn't support a more specific option: poisoning by unspecified antidepressants, intentional self-harm (T43.202), poisoning by unspecified antidepressants, assault (T43.203), poisoning by unspecified antidepressants, undetermined (T43.204), adverse effect of unspecified antidepressants (T43.205) and underdosing of unspecified antidepressants (T43.206).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category T43

Coding notes

Applicable toConditions and synonyms classified to this code
  • Poisoning by antidepressants NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to T43.201.

› From T43 Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified
Excludes2
  • appetite depressants (T50.5-)
  • barbiturates (T42.3-)
  • benzodiazepines (T42.4-)
  • drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-)
  • methaqualone (T42.6-)
  • psychodysleptics [hallucinogens] (T40.7-T40.9-)

Broader instructions also apply from T36-T50 Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Table of Drugs & Neoplasms entries

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about T43.201

Is T43.201 billable?

No. T43.201 is a header code. Report one of its more specific subcodes instead.